I promised some tips, so here you go.  When I travel, I make up a chart of the museums I want to see by location.  That way, I don’t waste time tubing all over town.  These are my favorites and the ones I’ll concentrate on for now.  For London, here are my clusters:

Here’s my chart with the essential information about prices, nearby attractions, and opening and closing times. Notice the star indicating extended hours, so I’ll know which museums I can see after the others have closed for the day:

More tips to come!